Question

I want to search for a string in DataTable if it starts with "null" delete this string, if this row has no values then erase this row too. Can someone show me how to do it?

ID    Name   Comment
2     lola    hallo
5     miky    hi
      null0          // delete null0 and remove this row     
      null1   ko     // delete null1 but do not remove this row
1      hub    why
3     null2          //delete null2 but do not remove this row

I tried to delete "null" but it doesn’t work.

My Code:

int ct1 = 0;
for (int i = 0; i < resE1.Rows.Count; i++ )
{
    if(resE1.Rows[i]["SignalName"].ToString() == "null" + ct1)
    {
        resE1.Rows[i].SetField<String>(2, "");
    }
    ct1++;
}

I find a solution to replace "null*" with empty spaces, but now I want to erase this row if the cells values of this row are empty, how can i do it?

int ct1 = 0;
for (int i = 0; i < resE1.Rows.Count; i++)
{
    string fix = resE1.Rows[i]["SignalName"].ToString();

    if(fix.Contains("null"))
    {
        resE1.Rows[i].SetField<String>(2, "");
    }
    ct1++;
}

Answer 1

I tried this. Works for me.

List<DataRow> rowsToRemove = new List<DataRow>();
foreach (DataRow dr in resE1.Rows)
{
    if (dr["Name"].ToString().IndexOf("null") == 0)
    {
        dr.SetField("Name", "");
    }
    bool hasValue = false;
    for (int i = 0; i < dr.ItemArray.Count(); i++)
    {
        if (!dr[i].ToString().Equals(String.Empty))
           hasValue = true;
    }
    if (!hasValue) rowsToRemove.Add(dr);
}
foreach(DataRow dr in rowsToRemove)
{
    dr.Delete();
}